These are just some of the more recent instances of corruption I can recall from both major parties involving foreign interests alone:
The reality of systemic and accepted corruption at many levels in this country and the perception by the New Zealanders themselves that they are the least corrupt country don't leave many pleasant conclusions. Either NZers are monumentally ignorant and they don't see or don't want to see the dodgy dealings for what they are, or every other country on Earth is a squalid, seething cesspit of rampant, unchecked corruption.
The claim that the NZ system - the state, the society - is free of corruption is not sustained by the evidence. The system is riddled with it. In a larger sense the Crown abrogation of the Treaty of Waitangi has resulted in a deeply entrenched and formalised corruption between central and local government in how those seized indigenous properties are exploited.